Bythotrephes longimanus Leydig, 1860

Korovchinsky, Nikolai M., 2023, Unexpected high species richness of Bythotrephes Leydig, 1860 (Branchiopoda: Cladocera: Cercopagididae) in subalpine Austrian lakes, with the description of new taxa, Zootaxa 5264 (1), pp. 77-93 : 84

Bythotrephes longimanus Leydig, 1860

This is the type species of the genus which was thoroughly revised by Korovchinsky (2015), when its representatives from the type locality (Lake Bodensee) and from some localities of Switzerland, Austria, Italy, and Great Britain were investigated. The Austrian representatives of the species were only slightly affected by this study. The present investigation using more abundant material has revealed that the latter ones are really morphologically specific, differing from specimens of western populations, and therefore worthy of being allocated to a separate taxon. Therefore, it turns out that the species B. longimanus is represented by two subspecies, B. longimanus longimanus Leydig and another new one described below.